Yarn winding



Jan. 6, 1970 r. a. PARRY 3488010 YARN WINDING Filed Sept. 15, 1967 United States Patent ffice 3,488,010 Patented Jan. 6, 1970 3,488,010 YARN WINDING Thomas Billington Parry, Pontypool, England, assignor to Imperial Chemical Industries Limited, Londen, Eng- Iand, a corporation of Great Britain Filed Sept. 15, 1967, Ser. No. 667,937 Claims priority, application Great Britain, Sept. 28, 1966,

Int. C1. B65h 54/22 U.S. Cl. 2412-18 6 Claims ABSTRACT OF THE DISCLOSURE A yarn winding process comprising the steps of temporary yarn entrainment, initial yarn entrainment on or near the yarn package carrier and yarn package collection, wherein initial yarn entrainrnent is effected at least in part in a groove formed by the abutment of two yarn carriers or one yarn carrier and an abutting member.

This inventon relates to yarn winding and, in particular, to a simple yarn entrainment means for the initiaton of yarn collection in said yarn winding.

Several devices have been suggested for the purpose of catching or entraining the running yarn to be col lected on a yarn carrier so as to nitiate the winding process, which may commence with the formation of a transfer tail at one end of the yarn carrier. Thus, for example, a slot or hook projecting from the end of the chunk or bolder upon which the yarn carrier is mouuted has been used. Such slots or hooks may be fixed or may operate centrifugally at a selected speed of rotation of the yarn carrier. Such devices have disadvantages in use, particularly if more than one yarn carrier is mounted on a single chuck or mandrel as for exarnple in the so-called dual winding of two yarns simultaneously on two yarn carriers.

A transfer tail consists of a sufiicient number of turns of yarn, wound initially on the yarn carrier clear of the main body of yarn, to enable a junction to be made between the yarn at the end of the package as unwound and the leading end of yarn on a further package. In this marmer the supply of yarn to a textile apparatus, wherein the yarn is further processed, can be made a continuous one and independent of the amount of yarn contained in any given yarn package.

According to the present invention we provide a yarn entrainrnent means for the initiation of yarn collection in a yarn winding process by which yarn is collected on one or more rotatable yarn carriers, said carrier or carriers being of substantially cylindrical form, wherein said entrainment means comprises a groeve which is formed between the end of a first yarn carrier and either the adjacent end of a contiguously placed second yarn carrier or an abutting rnernber.

Entrainment means according to this invention is particularly adapted for use in yarn winding processes wherein a transfer tail is first wound on the yarn carrier and thereafter the yarn package is built up because the initial yarn entrainment is at one end of the yarn carrier well outside the area on which the yarn package is subsequently built. However, the method may be used equally well to produce yarn packages without transfer tails. In the former case, that is when a transfer tail is to be laid, the winding apparatus will include any one of the known devices for temporarily holding the yarn to be wound outside that portion of the yarn carrier on which the package is to be laid, while allowing a transfer tail to be formed, after which the yarn is manually or automatically moved to be taken up by a yarn traversing guide to commence forming the yarn package. An example of such a temporary holding device is described hereinafter with reference to a dual winding process.

The shape of the groove formed by the juxtaposition of two yarn carriers or between a yarn carrier and an abutting member is not especially critical and may be, for example, of rectangular, square or V-shaped cross-section, the only requirernent being that the width of the groove at some point should be less than the minimum diameter of yarn to be wound. A very convenient shape is that pro duced by the juxtaposition of two yarn carriers, the ends of which have been partially chamfered, which groeve is of combined square and V-shape in cross-section. Alternatively cylindrical yarn carriers may be used which have ends not specially shaped, as for example, helically wound cardboard tubes which are frequently used in the collection of continuous filamentary synthetic yarns owing to their cheapness which allows the used empty tubes to be thrown away. The ends of such cardboard tubes are usual- 1y not planar and hence when pushed together on a common mounting as for dual winding 01 when pushed into contact with an abutting member in single yarn winding form a discontinuous groove which is a very effective initial entrainrnent rneans.

In dual winding processes, that is to say processes wherein two yarn packages are built up simultaneously on two yarn carriers, contiguously arranged end to end on a common rotatable mounting, it is preferred that winding on the two yarn carriers should be carried out in the same direction, as viewed from the end on which winding is initiated, in order that unwinding from several yarn packages grouped together will be all in the same direction. If winding is initiated on, for exarnple, adjacent ends of the two carriers on a cornm0n mounting and some twist is inserted in the two yarns during winding or subsequent processing, then there will be a tendency for untwisting to occur in one of these two packages when unwound fr.orn corresponding ends due to the opposite hand of winding. This is particularly necessary when winding of a transfer tail is carried out as a preliminary operation to yarn collection for in this case the end from which unwinding may be carred out is fixed by the presence of the transfer tail and hence also the hand of the unwinding is fixed. In dual winding processes it is also preferred that the initial entrainment of both yarns should be eifected simultaneously or substantially simultaneously to avoid any possibility of variability in the properties of the yarn in each package.

Yarn entrainment according to the invention is well adapted to achieve the preferred form of dual winding, the groove formed between the adjacent ends of the two carriers being used to nitiate winding on one carrier, while winding on the other is simultaneously or substantially simultaneously initiated on the other carrier by means according to this invention, wherein a member abutting the other end of the second carrier is used, or by means of a known device as for example an entrain Inent slot or hook hereinbefore referred to.

Thus according to another aspect of this invention we provide a process for winding yarn wherein the yarn is collected on at least one yarn carrier or substantially cylindrical form mounted on a rotatable carrying means, characterised in that winding on at least one carrier is initiated by entrainment of the yarn to be collected in a groove which is formed between the end of the ya n carrier and the end of a contiguously placed second yarn carrier or an abutting member.

The drawing is a general view of two mounted yarn carriers illustrating one method of dual winding according to the invention.

Referring to the drawing outer and inner yarn carriers 1 and 2 respectively are mounted on a rotatable chuck 3. A temporary holding and guiding means for each threadline is mounted close to each yarn carrier and adjacent to the initial entrainment points for Outer and inner threadlines 4 and 5. The temporary holding and guiding means comprise three parts, namely, movable crooks 6, fixed guides 7 and an actuating rod 8 connected to the lower parts of the crooks. Rod 8 passes through an outer mounting bracket 9 (and an inner mounting bracket not shown) and is mantained in a neutral position by a spring 10. Crooks 6 comprise an outer hook portion 11, a guiding portion 12 and a dwell porton 13. Fxed guides 7 comprise a first guide portion 14, a step 15 and a second guide porton 16 terminating in a rounded tip 17 which is cut away beneath. Yarn traverse guides 18 positioned close to the yarn carriers 1 and 2 are attached to reciprocating means not shown.

In operation outer and inner threadlines 4 and are passed through the hook portions 11 of crooks 6 and separately held by temporary entrainment means (not shown) as for example fixed or portable suction means, close to but just out of contact With the initial entrainment means. For the outer yarn carrier 1 the initial entrainment means is a groove 19 formed between adjacent ends of the yarn carriers 1 and 2 and for the inner yarn carrier 2 the initial entraintrnent means is 2. slot 20 in an inner flange of the rotatable carrier 3 close to the inner end of the inner yarn carrier 2. When the yarn carriers have reached ther correct operatng speed (which may be indicated by a stroboscopic disc fitted to the end of carrier 3) rod 8 is pressed inward as shown by the arrow causing the crooks 6 to move outwards and threadlines 4 and 5 to contact the inner limbs of hook portions 11 and to be pushed outward and so to be taken up by the respective initial entrainment means and to begin te slide down guide portions 12 and 14 into slots forrned between dwell portons 13 and steps 15 in the fixed guides 7. As the instant of initial entrainment threadlines 4 and 5 are broken between the points of initial entrainment and the temporary entrainment means. With rod 8 still pressed inwards threadlines 4 and 5 arrive at the dwell points 13 and transfer tails 21 being to be wound. When an adequate tail is wound rod 8 is released causing crooks 6 to return to their neutral positions and threadlines 4 and 5 to come out of the dwell slots and begin te slide down the second fixed guide portions 16, which motion continues until the threadlines drop 011 the tips 17 and are taken up by traverse -guides 18 thus initating winding of the yarn packages, the positions of which on the yarn carriers 1 and 2 are shown in the drawing by broken lines.

In operating a yarn winding process according to this invention When an abutting member other than a second yarn carrier is used to form part of the initial entrainment means, said abutting member may be fixed or manually adjustable or may, for example, be centrifugally operated so as to move close to the yarn carrier completing the entrainrnent means, at a selected winding speed.

What I claim is:

1. Yarn entrainment means for the initiation of yarn collection in a dual yarn winding process by which yarn is collected on two rotatable yarn carriers, each of said carriers being of substantially cylindrical form, wherein nitiation of yarn co-llection on one of said yarn carriers is by means of a groove formed between abutting ends of said two yarn carriers.

2. Yarn entrainment means according to claim 1 wherein said yarn carriers are arranged contiguously end to end on a comrnon rotatable mounting.

3. A dual winding process for winding yarn wherein the yarn is collected on two yarn carriers of substantially cylindrical form mounted on rotatable carrying means, characterzed by initiating on one of said yarn carriers by entraining the parn to be collected in a groeve which is formed between the abutting ends of said yarn carriers 4. A process according to claim 3 including collectirig said yarn on said yarn carriers arranged contiguously end to end on a common rotatable mounting.

5. A process according to claim 4 including form ng transfer tails on the yarn carriers after initial entrainment and before collecton of the yarn.

6. A process according to claim 4 including carrying out the winding on each yarn carrier in the same direction as viewed from the ends on which winding is initiated.

References Cited UNITED STATES PATENTS 2,262665 11/ 1941 Cavanaugh 242- .1 2,48 1,031 9/1949 McDermott 2421 8 2562,306 7/1951 Elvin et al. 2,815,905 12/1957 Birchler et al. 242125.1 XR .3,065,921 11/1962 Frst 24218 3,103305 9/1963 Heatherly. 3,149,795 9/ 1964 Rhein 242-18 FOREIGN PATENTS 814,764 6/ 1959 Great Britain. 1,025269 4/ 1966 Great Britain.

STANLEY N. GILREATH, Primary Examiner W. H. SCHROEDER, Assistant Examiner U.S. 'Cl. X.R. 242125.1 

